<template>
<div>
  <div class="todo-container">
    <div class="todo-wrap">
<MyHeader @addTodo="addTodo"></MyHeader>
  <MyList :todos="todos"></MyList>
  <MyFooter :todos="todos" @cheakAllTodo="cheakAllTodo" @clearAllTodo="clearAllTodo"></MyFooter>
</div>
  </div>
</div>
</template>
<script>
import pubsub from 'pubsub-js'
import MyHeader from "@/components/day6-TodoList案例/MyHeader";
import MyList from "@/components/day6-TodoList案例/MyList";
import MyFooter from "@/components/day6-TodoList案例/MyFooter";
export default {
  name:'App',
  components:{
    MyHeader,
    MyList,
    MyFooter
  },
  data(){
    return{
      todos:JSON.parse(localStorage.getItem('todos')) ||[]
    }
  },
  methods:{
    //添加
     addTodo(todoObj){
       this.todos.unshift(todoObj)
     },
    //勾选od取消勾选
    cheakTodo(id){
       this.todos.forEach((todo)=>{
         if(todo.id===id)
           todo.done=!todo.done
       })
    },
   //删除
    deleteTodo(_,id){
      this.todos=this.todos.filter((todo)=>{
         return todo.id !==id
       })
    },
    //全选或者取消全选
    cheakAllTodo(done){
     this.todos.forEach((todo)=>{
       todo.done=done
     })
    },
    //清除所有已经完成的todo
    clearAllTodo(){
      this.todos= this.todos.filter((todo)=>{
       return   !todo.done
       })
    },
    //修改todo中的title
    updateTodo(id,title){
      this.todos.forEach((todo)=>{
        if(todo.id===id)
          todo.title=title
      })
    }
  },
  watch:{
    //完整版监视
    todos:{
      deep:true,
      handler(value){
        localStorage.setItem('todos',JSON.stringify(value))
      }
    }
  },
  mounted() {
    this.$bus.$on('cheakTodo',this.cheakTodo)
    this.$bus.$on('updateTodo',this.updateTodo)
    // this.$bus.$on('deleteTodo',this.deleteTodo)
    this.pubId=pubsub.subscribe('deleteTodo',this.deleteTodo)
  },
  beforeDestroy() {
    this.$bus.$off('cheakTodo')
    this.$bus.$off('updateTodo')
    // this.$bus.$off('deleteTodo')
    pubsub.unsubscribe(this.pubId)

  }
}
</script>
<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}
.btn-edit {
  color: #fff;
  background-color: skyblue;
  border: 1px solid #588a99;
  margin-right: 5px;
}
.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>